Trust kelly plumbing & heating, your "small town plumber", serving the st paul and minneapolis. Ewwwww that smell can you smell that smell?? Only a trained professional should install your new boiler if you are having an lpg-run or gas boiler, the fitter must be a. Boiler problems? talk to frank! Safety considerations for enzymatic drain cleaners include a requirement to avoid contact with eyes and prolonged contact with skin. Our technicians are highly trained and experts in hvac service.